[1] Univ Colorado HSC, Aurora, CO USA
[2] Harvard Univ, Sch Med, Ctr Neurol Dis, Boston, MA USA
[3] Alaska Native Tribal Hlth Consortium, Liver Dis & Hepatitis Program, Anchorage, AK USA
[4] Ctr Dis Control & Prevent, Arctic Invest Program, Anchorage, AK USA
[5] Univ Washington, Div Lab Med, Seattle, WA 98195 USA